MIDI controller not working after upgrade to logic 9

macrumors 6502a

i upgraded to logic 9 and while ago and realised it made my midi keyboard stop working. i presumed it broke, as i hadn't used it for a few weeks before anyway, so never thought much of it. now when i've tried it on a friends system with logic 8 it works fine?

this is starting to really annoy me, that i can't get it to work! i've tried various usb cables, and looked in the audio midi setup and when it plugs in the 'midilink' icon lights up but still nothing. i have upgraded to snow leopard too, but my friends is on snow leopard aswell so i've counted that out.

MacRumors attracts a broad audience
of both consumers and professionals interested in
the latest technologies and products. We also boast an active community focused on
purchasing decisions and technical aspects of the iPhone, iPod, iPad, and Mac platforms.